<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <title>html获取url参数</title>
</head>
<body>
    <script type="text/javascript">
        var request = {
            QueryString : function(val) { 
                var uri = window.location.search; 
                var re = new RegExp("" +val+ "\=([^\&\?]*)", "ig"); 
                return ((uri.match(re))?(uri.match(re)[0].substr(val.length+1)):null); 
            }, 
            QueryStrings : function() { 
                var uri = window.location.search; 
                var re = /\w*\=([^\&\?]*)/ig; 
                var retval=[]; 
                while ((arr = re.exec(uri)) != null) 
                    retval.push(arr[0]);
                return retval; 
            }, 
            setQuery : function(val1, val2) { 
                var a = this.QueryStrings(); 
                var retval = ""; 
                var seted = false; 
                var re = new RegExp("^" +val1+ "\=([^\&\?]*)$", "ig"); 
                for(var i=0; i<a.length; i++) { 
                    if (re.test(a[i])) { 
                        seted = true; 
                        a[i] = val1 +"="+ val2; 
                    } 
                } 
                retval = a.join("&"); 
                return "?" +retval+ (seted ? "" : (retval ? "&" : "") +val1+ "=" +val2); 
            } 
        } 
        alert(request.QueryString("ab"));
    </script>
</body>
</html>